6251680745 has 4 divisors (see below), whose sum is σ = 7502016900. Its totient is φ = 5001344592.

The previous prime is 6251680741. The next prime is 6251680753. The reversal of 6251680745 is 5470861526.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1618291984 + 4633388761 = 40228^2 + 68069^2 .

It is a cyclic number.

It is not a de Polignac number, because 6251680745 - 2² = 6251680741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6251680696 and 6251680705.

It is not an unprimeable number, because it can be changed into a prime (6251680741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625168070 + ... + 625168079.

It is an arithmetic number, because the mean of its divisors is an integer number (1875504225).

Almost surely, 2^6251680745 is an apocalyptic number.

It is an amenable number.

6251680745 is a deficient number, since it is larger than the sum of its proper divisors (1250336155).

6251680745 is a wasteful number, since it uses less digits than its factorization.

6251680745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250336154.

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 6251680745 is about 79067.5707543870. The cubic root of 6251680745 is about 1842.1808523219.

The spelling of 6251680745 in words is "six billion, two hundred fifty-one million, six hundred eighty thousand, seven hundred forty-five".